Image forming apparatus certificate sheet making method and...

Details Image forming apparatus certificate sheet making method and... Image forming apparatus certificate sheet making method and...

2005-09-08

2009-12-29

Chai, Longbit (Department: 2431)

Cryptography

Electric signal modification

C380S245000, C380S246000, C713S155000, C713S156000, C713S157000, C713S158000, C726S027000, C726S028000, C726S029000, C726S030000

Reexamination Certificate

active

07639820

ABSTRACT:
An image forming apparatus has a micropattern reading unit, an encoded image generating unit and a code printing control unit. The micropattern reading unit reads a micropattern of a sheet. The encoded image generating unit generates an encoded image. The encoded image has the micropattern and a private key of a user. The code printing control unit prints the encoded image on the sheet to produce a certificate sheet.

REFERENCES:
patent: 2005/0172845 (2005-08-01), Umehara et al.
patent: 2004102562 (2004-04-01), None
patent: 2004112644 (2004-04-01), None
patent: 2004-147019 (2004-05-01), None
patent: 2004147019 (2004-05-01), None
patent: 2004151833 (2004-05-01), None

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